To confirm that the ability of T2 EBV to induce lymphomas in CBH mice is not unique to the T2 AG876 strain, and to determine if different results would be obtained using a T1 EBV strain containing the Zp-P form of the Z promoter, we also compared the ability of another T2 EBV virus (BL5), versus another T1 virus (Zp-P containing Mutu) to form lymphomas in the CBH model (using a dose of 3000 infectious units per mouse). This evidence concerns the gene OCA2 and lymphoma.